An engineering mock-up of the electrically-powered Apollo lunar roving vehicle (LRV), built by Boeing for fit-checks and other ground-based tests, on display at the Museum of Flight in Seattle, Washington, USA. The image shows the four flexible wheels and two seats with a control console between them. A colour TV camera can be seen at the front and an unfurlable communications antenna above. Three LRVs remain on the lunar surface from the Apollo 15, 16 and 17 missions of the 1970s.